https://dgap.org/de/forschung/publikationen/europa-braucht-eine-bessere-geooekonomische-strategie
https://ecipe.org/wp-content/uploads/2022/11/ECI_22_OccPaper_D9DigPol_05_2022_LY04.pdf
http://ecdpm.org/wp-content/uploads/ETTG-Brief-Keijzer-Medinilla-November-2017.pdf